EP0212727A1 - Optischer Schussfadenwächter für Webmaschinen mit U-förmigen Kamm - Google Patents

Optischer Schussfadenwächter für Webmaschinen mit U-förmigen Kamm Download PDF

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Publication number
EP0212727A1
EP0212727A1 EP86201339A EP86201339A EP0212727A1 EP 0212727 A1 EP0212727 A1 EP 0212727A1 EP 86201339 A EP86201339 A EP 86201339A EP 86201339 A EP86201339 A EP 86201339A EP 0212727 A1 EP0212727 A1 EP 0212727A1
Authority
EP
European Patent Office
Prior art keywords
optical
characteristic
stop motion
weft stop
receiver
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP86201339A
Other languages
English (en)
French (fr)
Other versions
EP0212727B1 (de
Inventor
Borge Riis Jensen
Willy Sierens M.D.
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Picanol NV
Original Assignee
Picanol NV
Weefautomaten Picanol NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Picanol NV, Weefautomaten Picanol NV filed Critical Picanol NV
Publication of EP0212727A1 publication Critical patent/EP0212727A1/de
Application granted granted Critical
Publication of EP0212727B1 publication Critical patent/EP0212727B1/de
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/18—Automatic stop motions
    • D03D51/34—Weft stop motions
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/277—Guide mechanisms
    • D03D47/278—Guide mechanisms for pneumatic looms

Definitions

  • This invention relates to an optical weft stop motion for looms with U-shaped reed, in other words a detection element to determine if the shoot extends completely or not through the gap of the loom.
  • a known arrangement of this type is described in the European patent application no. 109.929 and consists mainly of one optical emitter, one optical receiver and at least one reflector, whereby it is provided that the light beam between emitter and receiver crosses the recess in the U-shaped reed.
  • the reflectors and the emitter and the receiver according to the known designs do not have a compact design it is obvious that deviations are easily originated in the reflection of the light signal between the emitter and the receiver.
  • the passage of light is hampered by the thickness of the reed lamellae, the closeness and the oblique position of the lamellae.
  • the main disadvantage of the said design consists in the fact that by the use of two prismatic elements corners and clearances are created between, on the one side, these elements and, on the other side, the adjacent reed lamellae, in which dust accumulation may arise which may cause a wrong indication of the optical weft stop motion.
  • the present invention provides an optical weft stop motion which is very effective and reliable.
  • the invention relates to an optical weft stop motion for looms with a U-shaped reed, consisting in the combination of one optical emitter, one optical receiver and one optical conductive plate attachable between the reed lamellae which is provided with a recess which is congruent or almost congruent with and adjacent to the recesses in the U-shaped reed, whereby the optical conductive plate is provided with light reflecting side walls which guide the light in the shape of a beam from the emitter through the complete or almost the complete U-shaped recess of the plate and reflect it further to the receiver, and possibly a number of light absorbing side walls which exclude a wrong incidence of light.
  • the invention mainly consists in the combination of one optical emitter 1, one optical receiver 2 and one optical conductive plate 3.
  • the optical emitter 1 is formed by a point light source, e.g. a light emitting diode.
  • the optical receiver 2 consists of an arbitrary light sensitive electronic element. Naturally, the emitter 1 as well as the receiver 2 are connected by means of appropriate optical or electronic connections to on the one side a power supply and on the other side to a signal processing unit.
  • the optical conductive plate 3 is made from transparent plastic or possibly glass. It is preferred to use a strip of polycarbonate with a thickness of 0.2 to 0.35 mm.
  • the optical conductive plate 3 is provided with a metal lining plate, respectively 4 and 5, made from any possible material, in one shape or another so that the total thickness of the optical detector is in accordance with the mutual distance between two adjacent reed lamellae 6 and 7.
  • the optical conductive plate 3 As well as the metal lining plates 4 and 5, are provided with a recess 8 which is congruent or almost congruent with and adjacent to the recesses 9 which form the tunnel of the U-shaped reed.
  • the optical conductive plate 3 is provided with reflecting side walls 10 and 11, in one shape or another so that the light beams 12, which are emitted by the optical emitter 1 are reflected in the form of a bundle through almost the complete cross section of the recess 8 and eventually are received by the receiver 2.
  • the reflections along the side walls 10 and 11 may be of a prismatic nature. However, it is preferred that said side walls 10 and 11 are coated with a light reflecting material. For this purpose e.g. the side walls 10 and 11 are polished and then e.g. provided with a metal layer by means of vacuum deposition, e.g. aluminium.
  • the side walls 10 and 11 naturally are executed according to the invention in such a manner that, on the one side, always a parallel light beam 13 is obtained in the recess 8 by reflection in the side wall 10 and on the other side, said light beam 13 is reflected completely by the side wall 11 to the optical detector 2. For that reason in the embodiments of figure 1 the side walls 10 and 11 are made parabolic.
  • the internal corners 14 and 15 of the recesses 8 and 9 are, like in the most practical embodiments, provided with roundings, in such a manner that also the form of the reflecting side walls 10 and 11 are adapted to such a degree that the light beam remains almost parallel over the complete cross section of the recess 8 in the optical conductive plate 3.
  • the side walls 10 and 11 have shapes with parabolic portions 16 and portion 17 deviating from that.
  • the shape of portions 17 is adapted in such a manner that also the light rays which are refracted by the roundings in the internal corners 14 and 15, show such a path that, on the one side they form part of the parallel light beam 13, and, on the other side, are reflected to the optical detector 2.
  • one or more side walls 18 to 21 are dulled or painted black. Also the side walls which are adjacent to the lining plates 4 and 5 may, for the same reason, be dulled or painted black partly or completely.
  • the bridge 22, respectively between the portion of the plate 3 which is adjacent to the emitter 1 and the portion which is adjacent to the receiver 2 is made light absorbent, e.g. by coloring it.
  • the inner faces 25 and 26 are preferably painted black.
  • the optical conductive plate 3 is also provided with connecting faces 27 and 28 on which respectively the optical emitter 1 and the optical receiver 2 are mounted: This may be realized e.g. by mounting at first the optical emitter 1 and the receiver 2 on a supporting plate 29 with a great position accuracy, e.g. by means of techniques as employed by the fabrication of chips. Further, the supporting plate 29 with the emitter 1 and the receiver 2 is glued against the joining faces 27 and 28. Naturally, the metal lining plates 4 may provide the further necessary stiffening.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Woven Fabrics (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
EP86201339A 1985-08-26 1986-07-30 Optischer Schussfadenwächter für Webmaschinen mit U-förmigen Kamm Expired EP0212727B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE2/60769A BE903115A (nl) 1985-08-26 1985-08-26 Optische inslagwachter voor weefmachines met een u-vormig riet
BE2060769 1985-08-26

Publications (2)

Publication Number Publication Date
EP0212727A1 true EP0212727A1 (de) 1987-03-04
EP0212727B1 EP0212727B1 (de) 1989-05-03

Family

ID=3865766

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86201339A Expired EP0212727B1 (de) 1985-08-26 1986-07-30 Optischer Schussfadenwächter für Webmaschinen mit U-förmigen Kamm

Country Status (4)

Country Link
US (1) US4716942A (de)
EP (1) EP0212727B1 (de)
BE (1) BE903115A (de)
DE (1) DE3663158D1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0290706A1 (de) * 1987-05-14 1988-11-17 Istituto Nazionale Di Ottica Schussfaden-Kontrollvorrichtung in Luftwebmaschinen
WO1998024957A1 (de) * 1996-12-02 1998-06-11 Picanol N.V. Verfahren zur optischen überwachung von schussfäden beim eintragen in ein webfach und einen schusswächter
EP3382076A1 (de) * 2017-03-29 2018-10-03 Kabushiki Kaisha Toyota Jidoshokki Schussfadenerfassungsvorrichtung für eine luftdüsenwebmaschine

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0286590B1 (de) * 1987-04-08 1991-05-08 GebràœDer Sulzer Aktiengesellschaft Schussfadenspeicher für eine Webmaschine
DE3921402A1 (de) * 1989-06-29 1991-01-24 Kunststoff Verarbeitung Gmbh D Lichtelektrischer messkopf zur ueberwachung eines strangpresskunststoffprofils
JPH0726917B2 (ja) * 1990-01-12 1995-03-29 ローヌ―プーラン ヴィスコスイス ソシエテ アノニム 移動する糸の光電式監視装置
DE4142356A1 (de) * 1990-12-28 1992-07-02 Nissan Motor Einschuss-ueberwachungssystem fuer eine webmaschine
SE469597B (sv) * 1991-09-23 1993-08-02 Rydborn S A O Anordning foer oevervakning av inslaget i vaevstol, innefattande riktade ljuskaensliga element
SE469448B (sv) * 1991-09-27 1993-07-05 Rydborn S A O Optisk oevervakningsanordning foer att detektera om en traad aer i roerelse
GB9204413D0 (en) * 1992-02-29 1992-04-15 Northern Eng Ind Method and apparatus for observing of gap between relatively rotating parts
IT1257196B (it) * 1992-05-26 1996-01-10 Dispositivo per il controllo continuo dell'assetto e dell'integrita' degli aghi durante il funzionamento di una macchina per maglieria.
BE1006073A3 (nl) * 1992-07-03 1994-05-03 Picanol Nv Inslagwachter voor weefmachines.
JP2609048B2 (ja) * 1993-07-12 1997-05-14 沖電気工業株式会社 搬送媒体の検出装置
US11412900B2 (en) 2016-04-11 2022-08-16 Gpcp Ip Holdings Llc Sheet product dispenser with motor operation sensing
US11395566B2 (en) 2016-04-11 2022-07-26 Gpcp Ip Holdings Llc Sheet product dispenser
EP3748342B1 (de) * 2019-06-06 2023-05-03 Gebrüder Loepfe AG Optischer sensor zur messung einer eigenschaft eines länglichen textilkörpers in einem gleichmässigen optischen feld
EP3748285A1 (de) * 2019-06-06 2020-12-09 Gebrüder Loepfe AG Optischer sensor zur messung einer eigenschaft eines länglichen textilkörpers mit verminderter empfindlichkeit gegenüber umgebungslicht

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2125156A1 (en) * 1971-02-15 1972-09-29 Elitex Zavody Textilniho Weft thread detector - fitted to air jet shuttless looms
EP0109929A2 (de) * 1982-11-11 1984-05-30 Gebrueder Loepfe Ag Schussfadenwächter
EP0137380A2 (de) * 1983-10-10 1985-04-17 ROJ ELECTROTEX S.p.A. Optischer Schussfadenwächter für Düsenwebmaschine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1785035B2 (de) * 1968-08-02 1973-01-11 Sick, Erwin, 8000 München Vorrichtung zur ueberwachung des schussfadens bei schuetzenlosen webstuehlen
NL7206368A (de) * 1972-05-10 1973-11-13
CH589738A5 (de) * 1975-03-21 1977-07-15 Sulzer Ag
JPS6328225Y2 (de) * 1980-03-15 1988-07-29
CH646470A5 (de) * 1980-09-05 1984-11-30 Rueti Ag Maschf Duesenwebmaschine.
GB2090619A (en) * 1981-01-07 1982-07-14 Leesona Corp Means and method for sensing loom conditions
JPS59163448A (ja) * 1983-03-09 1984-09-14 日産自動車株式会社 空気噴射式織機の緯糸検知装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2125156A1 (en) * 1971-02-15 1972-09-29 Elitex Zavody Textilniho Weft thread detector - fitted to air jet shuttless looms
EP0109929A2 (de) * 1982-11-11 1984-05-30 Gebrueder Loepfe Ag Schussfadenwächter
EP0137380A2 (de) * 1983-10-10 1985-04-17 ROJ ELECTROTEX S.p.A. Optischer Schussfadenwächter für Düsenwebmaschine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0290706A1 (de) * 1987-05-14 1988-11-17 Istituto Nazionale Di Ottica Schussfaden-Kontrollvorrichtung in Luftwebmaschinen
WO1998024957A1 (de) * 1996-12-02 1998-06-11 Picanol N.V. Verfahren zur optischen überwachung von schussfäden beim eintragen in ein webfach und einen schusswächter
BE1010779A3 (nl) * 1996-12-02 1999-01-05 Picanol N V Naamloze Vennoosch Inslagwachter voor een weefmachine.
EP3382076A1 (de) * 2017-03-29 2018-10-03 Kabushiki Kaisha Toyota Jidoshokki Schussfadenerfassungsvorrichtung für eine luftdüsenwebmaschine

Also Published As

Publication number Publication date
EP0212727B1 (de) 1989-05-03
US4716942A (en) 1988-01-05
DE3663158D1 (en) 1989-06-08
BE903115A (nl) 1986-02-26

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